1.
Camshaft
2.
Dowel
3.
Camshaft Gear
4.
Lockplates
5.
Bolts
6.
Tachometer Shaft
7.
Breather Baffle
8.
Tachometer Adapter
9.
Seal
10.
"O" Seal Ring
11.
Seal Retainer
12.
Retainer Ring
13.
Pin
14.
Crankshaft
15.
Expansion Plug
16.
Starter Plug Gear Support
17.
Plug
18.
Retaining Ring
19.
Washer
20.
Roller
21.
Counterweight Bushing
22.
Counterweight
23.
Crankshaft Gear
24.
Lockplate
25.
Bolt
26.
Cover Plate
27.
"O" Ring Seat
28.
Thrust Washer
29.
Gov. Drive Gear
30.
Gov. Drive Shaft Gear
31.
Key
Figure 7-3. Camshaft, Gov. Drive and Crankshaft Assembly
Section 7 OVERHAUL MANUAL LYCOMING Crankcase.Crankshaft and Reciprocating Parts
Figure 7-4. Crankcase Interior Showing Moderate
Fretting at Stud Locations on Saddle Supports
7.17. Counterweights. See figure ‘i-3. Counterweights are disassembled from the crankshaft merely by removing the retaining rings (18), after which the washers (19), rollers (20) and counterweights (22) may be removed from the crankshaft ear.
NOTE
All counterweights and their related parts must be reassembled in the same location that they occupied on the crankshaft before disassembly. For example: The re- taining washers used with the counterweights are selec- tively fitted to the washer seats in the counterweights at the time of manufacture. It is advisable therefore. to mark all counterweight parts during disassembly to insure positive identification. These marks must be imperma- nent. No scoring, scratching, etching, or other permananent
marking of any kind is permissible on the counterweight parts.
7-18. To remove the crankshaft gear (23) flatten out the
lockplate (24) and remove the hex head screw or screws
(figure 7-3). Tap the crankshaft gear gently with a fibre
drift to remove gear from crankshaft. Do not remove the
dowel from rear of crankshaft ““less it has been obviously
damaged.
NOTE
On some of the earilier model of the 76 series engine, it was
not recommended to remove the crankshaft gear. These
can be identified by the presentence of 1 or2 dowels at the
mating surface between the crankshaft and gear. Some
models are equipped with the gear fasten to the
crankshaft by means of one bolt, lockplate and a locating
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